Quantum Chromodynamics and Electroweak Physics

*董在理论基本粒子物理方面的研究将包括量子色动力学(QCD)的工作，QCD是描述强核力的理论。这项工作将强调对实验数据的全局分析，以确定以夸克和胶子为单位的核子的精确组成。为了预测涉及核子的物理过程的速率，必须知道这一成分，核子既探索基本粒子物理学的现有“标准模型”，也探索超越该标准模型的新物理。还将有关于电磁力和弱核力之间的对称性在自然界中如何被打破的问题，以及寻找超对称性的工作，超对称性是构成物质的粒子和在物质碎片之间传送力的粒子之间的假设对称。所有这些研究对于我们更好地理解标准模型，以及探索超越标准模型的物理都是很重要的。***

*** Tung Research in theoretical elementary particle physics will include work on Quantum Chromodynamics (QCD), the theory which describes the strong nuclear force. This work will emphasize global analysis of experimental data to determine the precise composition of the nucleon in terms of quarks and gluons. This composition must be known in order to predict the rates of physical processes involving nucleons which probe both the existing "Standard Model" of elementary particle physics, and new physics which lies beyond this Standard Model. There will also be work on the question of how the symmetry between the electromagnetic and the weak nuclear forces is broken in nature, and on the search for supersymmetry, a hypothesized symmetry between the particles which are the constituents of matter, and the particles that carry the forces between bits of matter. All of these studies are important to our greater understanding of the Standard Model, and to our search for physics beyond it. ***